A quick comparison of both virgin specs as well as UOAs will show that if Ashland can claim that Valvoline oils meet or exceed Dexos 1, Ultra must exceed the requirements of Dexos 1.
There is no Valvoline oil in a class with Ultra.
Most of the UOAs of Synpower you see will show it to have inadeqaute TBN retention to be run to the extent allowed by the GM IOLM system. Check the UOA forum.
I write this as someone running Valvoline oil in one of my cars.
I also have three jugs of FAR Ultra in the garage, and they will be used in the Forester for its next three OCIs, followed with a UOA.
The UOA of Synpower I posted for this car was uninspiring at best.
OTOH, I've posted a great UOA of Nextgen Maxlife from my old BMW.
Synpower is not in the same league as Ultra, nor even PP.
I'd use Nextgen Maxlife without hesitation, based upon my results with it. Not too sure about Synpower, based upon my results with it.
There is no Valvoline oil in a class with Ultra.
Most of the UOAs of Synpower you see will show it to have inadeqaute TBN retention to be run to the extent allowed by the GM IOLM system. Check the UOA forum.
I write this as someone running Valvoline oil in one of my cars.
I also have three jugs of FAR Ultra in the garage, and they will be used in the Forester for its next three OCIs, followed with a UOA.
The UOA of Synpower I posted for this car was uninspiring at best.
OTOH, I've posted a great UOA of Nextgen Maxlife from my old BMW.
Synpower is not in the same league as Ultra, nor even PP.
I'd use Nextgen Maxlife without hesitation, based upon my results with it. Not too sure about Synpower, based upon my results with it.